Hi sjpt,
I am having the issue as ames 459 above.
I am also having trouble transferring library books from ADE on my computer to my Kobo ereader. I installed ADE on my computer, authorized my computer and have an Adobe ID and successfully authorized my ereader and transferred epubs from the library to the Kobo.
This is what happened next. I changed computers and installed ADE on a second computer and things worked. I have since gone back to my first computer which had an older version of ADE 2.0. This computer was still authorized with ADE. When I downloaded an EPUB from my public library the book successfully downloaded onto my computer in Adobe Digital Editions and I was able to open it up and read it in ADE on my computer. When I transferred the EPUB book in ADE to the ereader I received the following message on the ereader not on ADE:
Oops! This document couldn't be opened
This document is protected by Adobe Digital Rights Management and is not currently authorized for use with your Adobe ID. Please sign-in with the authorized Adobe ID and try again.
I didn’t know what to do so I uninstalled the ADE application and installed the lastest version 2.0. I also reinstalled my ereader desktop software. I deauthorized and reauthorized the Kobo (did this on the Kobo). Both the computer and ereader say that they are authorized. I read on the forum that version 1.7.2 was better so I have now resinstalled the older version but I am having the same error message (oops, this document couldn’t be opened).
I am not a very computer/technical savy and I don’t know what to do.
Thanks for the help